With LPS where the separation distance "s" is observed
If the building has an air termination system and the separation distance between the air termination system and the panels is maintained, there is no risk of a direct lightning strike to the PV system (impulse current with parameters of 10/350 µs). In this case we can install SPD type T2. A suitable representative of the SPD on position A, or on positions A and D at a distance of more than 10 m between the inverter and the panels, can be the HSA
PV 1 000 M. This product is determined specifically for the voltage UCPV = 1 000 V DC, but we
also offer variants for 600 V DC and 1 500 V DC. It is in the Y connection, which is resistant to the
earth fault of live conductors and has zero residual (leakage) current. If you insist on a cheaper variant,
we also offer variants in the full voltage range in U connection with a marking /2 at the end of the product
name. The entire product range brings the advantage of an exchangeable module design - the products are
marked with the letter M and meet the discharge capability for all LPL levels. It is equipped with an
internal DC arc fault disconnector and therefore no back-up fuse is required. If remote monitoring of
the surge protection status is required, the variants marked "S" can be used, i.e. for example HSA
PV 1 000 M S. The potential-free contact of this signalling is then connected to the to the building‘s
control system (typically as an input of a PLC control system), where it permanently informs the investor
about the status of the surge protection, without the need for physical control of the switchboard. Due
to the small price difference between the SPDs type T2 and T1+T2, the selection of SPDs can be generalized
to the T1+T2 type in all cases, thus avoiding human errors in the implementation of the PV plant and non-compliance
with the project documentation. As an example we can offer HLSA12,5 PV 1 000 S.
Since the building is equipped with an air termination system, it is necessary to install SPD type T1
in the main switchboard - at position C, or in the best case to select combined SPD type T1+T2+T3. This
type of building normally belongs into the LPL II level, for which the use of an 18,75 kA/pole arrester
is required. In this switchboard, at the beginning, before the PEN conductor is split into PE and N conductors,
it is common to see a TN-C system configuration with a voltage value of 3x 230 V / 50 Hz. These conditions
correspond to the product HLSA25G-255/3+0 S with remote monitoring. If the entire electrical
distribution system of the building is of type TN-S, the configuration HLSA25G-255/4+0 S can
be used. If the inverter is more than 10 m away from the main switchboard, it is necessary to repeat SPD
type T2 directly in front of the inverter - position B. If we consider a three-phase TN-S system, a suitable
representative is, for example, HSA-275/3+1 M S.
Our solutions
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SPD FOR DC (INVERTER)Nahrávám ...
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SPD FOR AC (INVERTER)Nahrávám ...
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SPD FOR ACNahrávám ...
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SPD FOR DCNahrávám ...
By ticking this box you will give us the information that you are not sure about the correctness of your selection. However, it is necessary to send an inquiry.